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The Journal of Health, Population and Nutrition
icddr,b
ISSN: 1606-0997 EISSN: 1606-0997
Vol. 27, No. 5, 2009, pp. 619-631
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Bioline Code: hn09060
Full paper language: English
Document type: Research Article
Document available free of charge
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The Journal of Health, Population and Nutrition, Vol. 27, No. 5, 2009, pp. 619-631
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Effect of Prenatal Zinc Supplementation on Birthweight
Saaka, Mahama; Oosthuizen, Jacques & Beatty, Shelley
Abstract
Although iron and zinc deficiencies are known to occur together and also appear to be high in Ghana,
a few supplementation studies addressed this concurrently in pregnancy. In a double-blind, randomized
controlled trial, 600 pregnant women in Ghana were randomly assigned to receive either a combined supplement
of 40 mg of zinc as zinc gluconate and 40 mg of iron as ferrous sulphate or 40 mg of elemental iron
as ferrous sulphate. Overall, there was no detectable difference in the mean birthweight between the study
groups, although the effect of iron-zinc supplementation on the mean birthweight was masked by a strong
interaction between the type of supplement and the iron status of participants [F (1,179)=5.614, p=0.019].
Prenatal iron-zinc supplementation was effective in increasing the mean birthweight among anaemic and
iron-deficient women but not among women with elevated iron stores in early pregnancy.
Keywords
Birthweight; Double-blind method; Impact studies; Prospective studies; Randomized controlled trials; Iron supplementation; Zinc supplementation; Ghana
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